Lewis & Short

lāĭcus, a, um, adj., = λαϊκός, of or belonging to the people or laity, not priestly, not consecrated: non habeo laicos panes, loaves not consecrated, Vulg. 1 Reg. 21, 4.
Subst.: lāĭcus, i, m., a layman, laic, one not belonging to the priesthood (eccl. Lat.), Tert. Exhort. ad Castit. 7; opp. clericus, Hier. adv. Lucif. 3 al.